(1) Your coin has MD with metal striation lines on the upper NW part of the 9. This is just evidence that the die moved after the strike reducing that device. Note how that area was reduced in size.
Machine Doubling was is very common on the 1968-1972 cents. On the 1973 cents, they used more pressure for the strikes, (thus the taller rims that year) but occasionally we still find MD on about all coin all years. But the dates I mentioned above seem to have more than most other years.
What is metal striation? If you took a kitchen parring knife and rubbed the blade on edge over a stick of butter that is room temperature, the edge of the blade will leave metal striation lines on the butter. When a die slides a bit on a device, you will see these striation lines on a device that is altered:
There is no premium for these, but knowing what causes them is a help when your searching through coins. Some may see this and think it is notching, it it isn't. Why, Notching is usually accompanied with enlarge of the devices. On all these examples, the metal was reduced in overall size. (except on incuse devices, when the MD enlarges the devices)
Coophome= metal striations
Posted 03/06/2018 2:27 pm
Ahh, striation lines.
